Medical symbols: The Caduceus

http://drblayney.com/Asclepius.html

[1] The Caduceus of Mercury (Roman) and the Karykeion of Hermes (Greek)
Many "medical" organisations use a symbol of a short rod entwined by two snakes and topped by a pair of wings, which is actually the caduceus or magic wand of the Greek god Hermes (Roman Mercury), messenger of the gods, inventor of (magical) incantations, conductor of the dead and protector of merchants and thieves. It is derived from the Greek karykeion = "herald's staff", itself based on the word "eruko" meaning restrain, control.
It is interesting to see that most of organisations using this symbol are generally either commercial or military (or American). New Zealand examples include drug and pharmaceutical companies. A study by Friedlander confirms this impression.
The link between the caduceus of Hermes (Mercury) and medicine seems to have arisen by the seventh century A.D., when Hermes had come to be linked with alchemy. Alchemists were referred to as the sons of Hermes, as Hermetists or Hermeticists and as "practitioners of the hermetic arts". There are clear occultassociations with the caduceus.
The caduceus was the magic staff of Hermes (Mercury), the god of commerce, eloquence, invention, travel and theft, and so was a symbol of heralds and commerce, not medicine. The words caduity & caducous imply temporality, perishableness and senility, while the medical profession espouses renewal, vitality and health.

Asclepius and his staff

Statue of Askleppios at Guys Hospital

Who was Asclepius? Asclepius was most probably a skilled physician who practised in Greece around 1200BC (and described in Homer's Iliad). Eventually through myth and legend he came to be worshipped as Asclepius, the (Greek) god of Healing. [See BBC reference]
Medical schools developed, which were usually connected to temples or shrines called Asclepions (Asclepieia) dedicated to Asclepius. The Asclepion became very important in Greek society. Patients believed they could be cured by sleeping in them. They would visit, offering gifts and sacrifices to the god, and be treated by priest healers (called the Asclepiadae). The worship of Asclepius spread to Rome and continued as late as the sixth century.
The Asclepiadae were a large order of priest physicians who controlled the sacred secrets of healing, which were passed from father to son. Harmless Aesculapian snakes were kept in the combination hospital-temples built by the ancient Greeks and, later, by the Romans in honor of the god. The snakes are found not only in their original range of southern Europe, but also in the various places in Germany and Austria where Roman temples had been established. Escaped snakes survived and flourished.
Smooth, glossy, and slender, the snake has a uniformly brown back with a streak of darker color behind the eyes. The snake's belly is yellowish or whitish and has ridged scales that catch easily on rough surfaces, making it especially adapted for climbing trees. Scientific classification: The Aesculapian snake belongs to the family Colubridae. It is classified as Elaphe longissima.
The Myth: Asclepius is the god of Healing. He is the son of Apollo and the nymph, Coronis. While pregnant with Asclepius, Coronis secretly took a second, mortal lover. When Apollo found out, he sent Artemis to kill her. While burning on the funeral pyre, Apollo felt pity and rescued the unborn child from the corpse. Asclepius was taught about medicine and healing by the wise centaur, Cheiron, and became so skilled in it that he succeeded in bringing one of his patients back from the dead. Zeus felt that the immortality of the Gods was threatened and killed the healer with a thunderbolt. At Apollo's request, Asclepius was placed among the stars as Ophiuchus, the serpent-bearer.
Meditrine, Hygeia and Panacea: The children of Asclepius included his daughters Meditrina, Hygeia and Panacea who were symbols of medicine, hygiene and healing (literally, "all healing") respectively. Two of the sons of Asclepius appeared in Homer's Illiad as physicians in the Greek army (Machaon and Podalirius).
Note that the classic Hippocratice Oath is sworn "by Apollo the physician, by Æsculapius, Hygeia, and Panacea, ....."
The probable medical origin of the single serpent around a rod: In ancient times infection by parasitic worms was common. The filarial worm Dracunculus medinensis aka "the fiery serpent", aka "the dragon of Medina" aka "the guinea worm" crawled around the victim's body, just under the skin. Physicians treated this infection by cutting a slit in the patient's skin, just in front of the worm's path. As the worm crawled out the cut, the physician carefully wound the pest around a stick until the entire animal had been removed. It is believed that because this type of infection was so common, physicians advertised their services by displaying a sign with the worm on a stick. [See graphic photos -not for the faint-hearted or Benjamin.]
The staff as a Medical symbol: From the early 16th century onwards, the staff of Asclepius and the caduceus of Hermes were widely used as printers’ marks especially as frontispieces to pharmacopoeias in the 17th and 18th centuries. Over time the rod and serpent (the Asclepian staff) emerged as an independent symbol of medicine.
Despite the unequivocal claim of the staff of Asclepius to represent medicine (and healing), the caduceus, a rod with two entwined serpents topped by a pair of wings appears to be the more popular symbol of medicine in the United States, probably due to simple confusion between the caduceus and the staff of Asclepius, the true symbol of medicine. Many people use the word caduceus to mean both of these emblems.
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Medical Council
 
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